birth control making me throw up??

So i took my first ever birth control pill 12 hours ago. Everything was fine and i even had sex (he wore a condom) but i got into bed and suddenly felt sick, but i brushed it off as a stomach ache and when to sleep. I have hyperventilation issues from anxiety and i had an awful breathing attack just before i felt sick. i woke up around half 3 am and felt horribly sick, it ended up with me throwing up on my floor and again it happened two hours later.